Here is the code we are using for doing the conversion..
Aspose.Slides.License pptLicense = new Aspose.Slides.License();
pptLicense.SetLicense("Aspose.Total.lic");
Aspose.Slides.Presentation presentation = new Aspose.Slides.Presentation(sourceFile);
presentation.SaveToPdf(destinationFilePath);
It does convert for some files but fails for many files. A general observation is if the file size >= 5 mb it fails to convert it.
We are using Aspose.Slides 3.1.1.0 & Aspose.Pdf 4.0.0.0
I have attached the file which fails. Can you please take a look.